Material for lining concrete tanks.



l H. oRsAm-HSCHER. NI/H'ERIL FOR LINING CONCRETE TANKS.

MPLICATlO-N FILED SEPT. IB, 1'9I2. 4

PatentedSept. 7', 1915.

@ @swig 5 been employed MATEKAL FOR ilN'NSl CGNCRETE TANKS.-

Specification of Letters fate-at.

Application .filed September 18, 1912.

2b all "ii/limit it' may concern.'

lle it known that I, Hammett BoiisARrllisonica, engineer, oi Switzerland, residing at Zollikon, near Zurich, Switzerland, here invented'new and useiiil improvements in llaterials for Lining Concrete Tanks; and do hereoy cle-A elai'e. the following to he a full, Clearhaniil exact description of the invention, such as will enable others skilled in the art to which' :it :ippertnins to make :intl use the same. i

For l'lic pin-pose ol obtaining an aciclproot lining for concrete tanks, frequently acidprooi'l fusible mixtures of asphalt, parafiin, resins and the like are employed. lf such aciill'ii'ool.I compounds arc to he directly/xapplieil to the Walls of the concrete'tank, While they are still in a fused or plastic condition, it is necessary for the vwalls to he absolutely ilry and they must therefore loe previously siilnnittcfl to a long drying process, as on the one lianfl dan'ipness will prevent the hot ceii'ipoiinil from adhering and on the other liaiitl the caustic alkalies contained in the cenient will act in a saponityiiig manner or in other words ilestroy the liner.' it yhas been siiggesi'ei'l, for the purpose of remeclying this trouble, prooi liner anil the concrete Wall an instalating intiariiiediate layer of sheet iron, rool ingF telt, poroiis substances, stationary air or the like, iinil such eoiiihiiiatioiis have in form of finished plates or honi-ils with which the tanks were then lineil. lut this necessitates the iise of inetaliie reinforcements which engage both in the lining` material anfl the concrete, and

hesiiles this method has not proved satis-- faeti'iry in practice. lt has ini-ther been hosted, lor the purpose of obtaining a more secure adhering of the acitl proof liner to iiialce the saiil liner oi a porous maierial honrirl by cement, and impregnated with the :iehlproof fusible n'iaterial. But also this inetlioil has the disadvantage, that the. aeiilproof lining material will come in diri-et contact with the concrete, the fused material will wholly penetrate the porous venecrini layer, which hesifles hound by vement. unil therefore the saiil fused matethe alkali in the cement, if this ecincnt or llie concrete still contains any moisture. All these ilillieul ics are ohviateil by the present invention hy :in intermediate layer Aheilig arranged between the aeidpreof liner and a citizen of the Republielalior also :i Very ties liiit of to iii-renee between the aci (l.v

.that an terial 'that is acid resisting. Their rial will he destroyed or ai; least affected hy Feten teil Sept. 7, 1915. Serial No. 221,685.

the vwall of the tank, which intermediate layer will prevent the moisture from pene trating and is hesicles alkaliproof; besidesl the iise of such layer will obviate the necessityY oi" previously ilryiiig out the tank and ofeniploying mechanical fixing means. The lining n'iaterial may therefore be applied together` willi the alkaliproof intermediate layer olireetly to the c amp walls or" the tank, anil evenlie attachefl to the said Wall already (hiring the construction of the concrete tank, iviierehi'-hesifles a intimate, close and durable lionil between the ci'increte Wall and the liner is obtained. This object is obtained according1 to the present invention by plates or the like being made of two layersof eijiial vor at least similar physical properrlilierent chemical' behavior, of which layers the one is composed of an` alkai'iproof mixture of organic, fusible subsfani'fes, which may, teieing'a ,creat-cr strength and for reducing the cost, also contain an organic filling material, while the other laver consists of a mixture 01"' aciflproo fusible substances, whim inziet on the hand be able to resistiri'lie action ol" the contents of the tank, anil' on the. other' mist .not ai'ect the same stance not v@five the said l Yin any way, for in contents any smell or flavor. liereinliei'fore, an essential feature, that both layers have the same physical properties, so intimate inseparable compound is obtained. For this purpose both layers may contain such substances only, which Will be inutziallyv :il'isorheil when in a fused condition or `with other Words, which may then he niincifl.

The dran/ing represents a transverse section of thisdiiplex lining applied to a concrete wall flesigneil te repiese1itA thev Wallof a tank. l

A is the concrete wall and B 'the plate, consisting oi two layers C and D melted together. T ie layers C and D of the plate have different chemical resisting, while the layer D consists of ma physical properties are however alike or nearly alike so thathoth materials are irmly connected with one another at the place of contact hy melting". andso form a single plate, with which the concrete wall is lined. This lining can he applied by crea;v saving in time and` for the purpose foh? fastening the plate to it is. as said.

qualities, in that vlayer C consists of material that is alkali l, the wall after the buildingthereof by means of mortar or cement, etc., or the concrete wall-and lining can, as described, be formed i together.

These plates are preferably manufactured in the following manner: A highly heated, fused mixture of those substances, which are to Vformthe alkalipro'of v,layer is poured to a suitablethickness on a v rolled sand bed, whereby an intimate bond age between the 'grains of sand and the alkaliproof material is obtained. This coating has Vmerely the object to .facilitate the bond with the concretewall,bah-increasing the surface. It isobvius thatv the same purpose may also be obtained in any other known manner, for instance by providing a kcorrugated surface, by recesses, grooves and the like. When these plates have cooled,

the acidproof layer is applied.l by pouring a suitable fused compound of a' suitable vtemperature on it,wh1ch will be just suici'ent to liquefy the uppermost surface' of the' first layer, so as to insure an intimate bond .fthrough the two layers 'intermixing at their surface of contact. Naturally the `procedure may also be reversed, and the acid roof layer may be first cast whereupon the a kali- 'proof laye`r is cast on it. Int this case the v acidproof layer must, of course,- be cast on i.

.a smooth surface, and thetop surface, of

the alkaliproof layer must be then rovidedv with the hereinbefore mentioned orvp Erugations, grooves, recesses and the like. The size of the "85 lates, their 'thickness 'and the thickness of t e compound plate may be varied according to the respective requirements. Suitable acid and alkaliproofxnix- Vtures of organic fusible materials;- ifare known; the ratio of the mixtures ust,

however, to be so chosen', that the two-lays have the samestipulated physical pro' rties. vSo for'instance a mixture of asp a1- tum, guttapercha and woolfat, freed by soda lye from the 'saponiiable componenti vmay be used as alkaliproof material, tol l445 cum being 'addedas a fi lin An a'cdproof K layer, which will bind wel thereto g tained by fusing Manila cop'al or some other resin with pitch, freed of its components of a low meltingpint and condensed linseed oil, talcum again bein 'used as a. filling. I The concrete tanks are ined with v the com- I pound plates thus made bysaid plates be' placed into the molds for the concrete 7w whereupon the concrete is stam ed into the it mold; or the plates are secured `means of Acement .mortar to thenishe vconcreta walls. f,' I`l1e` 'joints between i" the several plates', which arelprefeljably madel about in. wide-mustthen. befgouted out with 60 the same materialsflmft-hose of which the plates are com osedfbd Jri'such a manner. that rst the a aliproof'flayer and then the acidproof layer is poured. Bysuch meisl a continuous, homogeneous and 0b 'lining is obtained,'which is characterizedcb consisting oftwo layers olfl equal physi properties, of which the one'in ycontact wit/5M the attack of the contents of the vessel.

In testimony, that ,I claim-the foregoing as my invention, I have sig'nedmy-name5r presence of two subscribin Witnesses.-"'""QA H BORSA LFISCHER.; .Witnesses:

A CARL Cuvnnn,

WAL'rER STRENE. 

